Begin by preheating your oven to 350°F (175°C). Prepare a muffin tin by either lining it with paper liners or lightly greasing each cup with non-stick cooking spray.
In a large mixing bowl, combine the eggs, granulated sugar, brown sugar, and vegetable oil. Use a whisk or hand mixer to beat the mixture until it is smooth and well blended.
Incorporate the grated zucchini and vanilla extract into the egg mixture, stirring until the zucchini is evenly distributed throughout.
In a separate bowl, sift together the all-purpose flour, whole wheat flour, baking powder, baking soda, sea salt, and ground cinnamon for a well-combined dry mix.
Gradually add the dry ingredients to the wet ingredients. Stir gently until just combined, being careful not to overmix to ensure a tender muffin.
Carefully fold in the semi-sweet chocolate chips and chopped nuts (if you choose to use them), making sure they are evenly distributed throughout the batter.
Using a spoon or ice cream scoop, portion the batter into the prepared muffin tin. Fill each cup about two-thirds full to allow room for rising.
Place the muffin tin in the preheated oven and bake for 18-20 minutes. To check for doneness, insert a toothpick into the center of a muffin; it should come out clean or with just a few moist crumbs.
Once baked, allow the muffins to cool in the tin for about 5 minutes. Carefully transfer them to a wire rack to cool completely, enhancing their texture.
Notes
Serve warm for the best experience. Dust with powdered sugar for an elegant touch.